Explain how soil gets affected by the continous plantation of crops in a field.

Explain how soil is formed.

A reaction is first order in A and second order in B. (i) Write differential rate equation. (ii) How is rate affected when concentrated of B is tripled ? (iii) How is rate affected when concentration of both A and B is doubled ?

Explain any three features that affect the ionisation enthalpy.

Explain the features that influence/affect the ionization energy.

How do radiations affects the cells ?

How is soil formed?

Explain how sexual reproduction gives rise to more viable variations than asexual reproduction. How does this affect the evolution of those organisms that reproduce sexually?